CN203654294U - Foundation pit supporting structure used in reverse building method - Google Patents
Foundation pit supporting structure used in reverse building method Download PDFInfo
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- CN203654294U CN203654294U CN201320829599.0U CN201320829599U CN203654294U CN 203654294 U CN203654294 U CN 203654294U CN 201320829599 U CN201320829599 U CN 201320829599U CN 203654294 U CN203654294 U CN 203654294U
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- foundation pit
- foundation ditch
- supporting
- diagonal brace
- base plate
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Abstract
The utility model discloses a foundation pit supporting structure used in a reverse building method. wherein the foundation pit supporting structure used in the reverse building method is used for solving the problems that along with increasing of the excavation area and the excavation depth of a foundation pit, the safety and economy principle is difficult to meet through a horizontal inner support in the prior art, the manufacturing cost is high, the construction period is long, and a large amount of solid waste is generated after the horizontal inner support is dismantled. The foundation pit supporting structure comprises enclosure walls located on the side faces of the foundation pit, and a plurality of inclined supports, wherein top beams are arranged at the top ends of the enclosure walls, the top ends of the inclined supports are fixedly connected with the top beams, and the bottom ends of the inclined supports are fixedly connected with a bottom plate of the foundation pit. According to the foundation pit supporting structure used in the reverse building method, the horizontal support is not used any more, the project amount of an enclosure structure is reduced, the manufacturing cost of projects is reduced, and the construction period is shortened. Besides, under the condition that the deformation amount of the foundation pit is controlled within a reasonable range through the foundation pit supporting structure used in the reverse building method, waste and environmental pollution caused when a large amount of solid waste is generated after the horizontal inner support is dismantled are avoided.
Description
Technical field
The utility model relates to technical field of civil engineering, specifically the supporting and protection structure of foundation ditch in a kind of contrary sequence method.
Background technology
In base pit engineering, soil mass of foundation pit excavation can cause the change of stress field, causes the distortion of surrounding soil, and Adjacent Buildings and pipeline etc. are exerted an influence.Impact foundation ditch surrounding enviroment being caused in order to reduce foundation pit construction, can set up foundation pit supporting construction conventionally.Adopt the foundation pit supporting construction of horizontal inner support at Soft Deep Foundation Pit engineering in general, but along with the area of excavation of foundation pit and the increase of the degree of depth, the foundation pit supporting construction of horizontal inner support has been difficult to meet the principle of safety economy, produces the problems such as a large amount of solid waste after there is high, the long in time limit and horizontal inner support of dismounting of cost.
Utility model content
The purpose of this utility model is to provide the supporting and protection structure of foundation ditch in a kind of contrary sequence method, produces the problems such as a large amount of solid waste for solving after existing horizontal inner support exists high, the long in time limit and horizontal inner support of dismounting of cost.
To achieve these goals, the technical solution of the utility model is:
A supporting and protection structure for foundation ditch in contrary sequence method, comprising: the enclosure wall that is positioned at described foundation ditch side; And some diagonal braces; The top of described enclosure wall is provided with Guan Liang, and the top of described diagonal brace is fixedly connected with described Guan Liang, and the bottom of described diagonal brace is fixedly connected with the base plate of described foundation ditch.
Further, described diagonal brace is built and is formed by steel concrete.
Further, the bottom of described diagonal brace is fixedly connected with the bracket being fixed on described base plate.
Further, the base plate of described foundation ditch has central area and perimeter zone, and described bracket is positioned at the edge of described base plate central area.
Further, described bracket is built and is formed by steel concrete.
Further, the reinforcing bar of described diagonal brace is fixedly connected with the reinforcing bar in described bracket with described Guan Liang respectively.
Further, described base plate is wedged in the one end that is positioned at the reinforcing bar of sidewall on described bracket, and the development length D that described reinforcing bar is crossed described base plate internal upper part horizontal reinforcement is greater than 1000mm.
Further, adjacent described diagonal brace level interval is 3 meters～5 meters.
Further, the angle of described diagonal brace and horizontal plane is 10 degree～20 degree.
Compared with prior art, tool has the following advantages and beneficial effect the utility model:
1, in reverse construction, adopt foundation pit supporting construction of the present utility model, the horizontal permanent structure plate of foundation ditch top has replaced original Horizontal steelwork bracing, plays the effect to foundation ditch horizontal support.And the diagonal brace being connected between Guan Liang and base plate of foundation pit further plays the support to enclosure wall, foundation pit enclosure structure compared to existing technology, the supporting and protection structure of foundation ditch in contrary sequence method of the present utility model, reduce the engineering quantity of supporting and protection structure, and then avoided producing waste and the environment pollution that a large amount of solid waste cause after removing horizontal inner support.
2, the supporting and protection structure of foundation ditch in contrary sequence method of the present utility model, diagonal brace is built and is formed by steel concrete, can make at the construction field (site) and complete installation, it is very convenient to operate, and in prior art conventional Horizontal steelwork bracing in reverse construction scene, because of the horizontal structure plate constuction joint size of foundation ditch top less, be unfavorable for the transportation of section steel material, and, also reduced the work of a large amount of cuttings and fabricated structural shape, reduced construction costs, shortened the duration, and foundation pit deformation amount can be controlled at rational scope.
Accompanying drawing explanation
Fig. 1 is the supporting and protection structure schematic diagram of foundation ditch in the contrary sequence method of the utility model one embodiment;
Fig. 2 is the position view of the bracket of the utility model one embodiment.
The specific embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described, preferred embodiment described herein is only for description and interpretation the utility model, and is not used in restriction the utility model.It should be noted that, accompanying drawing adopts the form of simplifying very much and uses non-ratio accurately, only in order to convenient, the object of aid illustration the utility model embodiment lucidly.
Describe the supporting and protection structure of foundation ditch in contrary sequence method of the present utility model in detail below in conjunction with Fig. 1 and Fig. 2.
As shown in Figure 1, the supporting and protection structure of foundation ditch in a kind of contrary sequence method, comprises the enclosure wall and the some diagonal braces 2 that are positioned at foundation ditch side, and the top of enclosure wall is provided with hat beam 5, and the top of diagonal brace 2 is fixedly connected with hat beam 5, and the bottom of diagonal brace 2 is fixedly connected with the base plate of foundation ditch.
When Specific construction, in foundation ditch surrounding side, enclosure wall is set in advance, enclosure wall top arranges hat beam 5, then carries out the permanent structure plate of uplift pile, steel post and underground every first floor and the construction of other vertical structures.When Specific construction, adopt reverse construction to put slope at the bottom of Foundation Pit.
Continue with reference to figure 1 and Fig. 2, the permanent structure plate of foundation ditch top carries out foundation ditch excavation and construction after having built, and classification is excavated to hat beam 5 bed course absolute altitudes.Foundation ditch is divided into central area and perimeter zone step excavation, and wherein, foundation ditch central area is divided into first area A, second area B, the 3rd region C and the 4th region D and excavates successively in totally four regions.The foundation ditch excavation and construction for the treatment of each central area completes, and builds after base plate of foundation pit structure, above the central area base plate of foundation pit of having built, sets up bracket 3, and bracket 3 is near the edge of the base plate of foundation pit 1 of central area.Base plate of foundation pit and bracket 3 until central area reach after design strength, are symmetrical arranged braced structures in corresponding perimeter zone.Particularly, braced structures comprises diagonal brace 2 and angle brace 4.Adjacent diagonal brace 2 level intervals are 3 meters～5 meters, and the inclination angle of diagonal brace 2 is 10 degree～20 degree, and such design can meet the diagonal brace 2 that uses minimum number in the situation of foundation ditch integer support safety.These diagonal brace 2 tops are fixedly connected with hat beam 5, and diagonal brace 2 bottoms are fixedly connected with the base plate of foundation ditch.Further, set up the bracket 3 of being built by steel concrete at the edge, central area of base plate of foundation pit.Thereby the bottom of diagonal brace 2 is fixedly connected with the bracket 3 being fixed on base plate of foundation pit, realizes better support effect.Owing to adopting reverse construction, constuction joint size between permanent structure plate and the construction area of foundation ditch is smaller, installation dimension to braced structures is had relatively high expectations, thereby and the long inconvenient installation of the length of conventional Horizontal steelwork bracing, therefore diagonal brace 2 adopts steel concrete to make, it can be built and form at the construction field (site), easy to operate.When construction, first the reinforcing bar binding in hat beam 5, diagonal brace 2 and bracket 3 is fixedly connected with to then concreting.The reinforcing bar wedging base plate of foundation pit that is positioned at sidewall on bracket 3, the development length D that reinforcing bar is crossed base plate internal upper part horizontal reinforcement is greater than 1000mm.By such form of construction work, can effectively reduce concentrative operation and the impact of construction stack on foundation ditch safety of surrounding environment.
Specifically, the structural strength of the permanent structure plate above foundation ditch basement reaches after designing requirement, carry out first area A soil excavation, when digging to certain depth, to dig out after ladder platform, slope is put in the earthwork, continue to dig down one deck soil, carry out the interlayer earthwork according to the ratio of 1:2 and put slope, to base plate of foundation pit absolute altitude, the side slope soil of foundation ditch limit indwelling certain width.Now, build the C20 element concrete bed course of 200 millimeters thick while digging at A place, first area.As shown in Figure 2, after the base plate of foundation pit of first area A is built successfully, set up bracket 3 in first area A base plate of foundation pit 1 edge position.Base plate of foundation pit and bracket 3 until first area A reach after design strength, are symmetrical arranged diagonal brace 2 and angle brace 4 in corresponding perimeter zone.Particularly, the top of this diagonal brace 2 is fixedly connected with hat beam 5, and the bottom of diagonal brace 2 is fixedly connected with bracket 3.The mounting means of angle brace 4 is with diagonal brace 2.
Further, carry out second area B soil excavation, wait while digging to certain depth, dig out after ladder platform, slope is put in the earthwork, continues to dig down one deck soil, carry out the interlayer earthwork according to the ratio of 1:2 and put slope, to base plate of foundation pit absolute altitude, the side slope soil of foundation ditch limit indwelling certain width.Now, build the C20 element concrete bed course of 200 millimeters thick while digging at second area B.Then carry out the second central area B base plate of foundation pit structure construction, then carry out the symmetry excavation of corresponding perimeter zone, and be symmetrical arranged diagonal brace 2 in this perimeter zone.Concrete method to set up is the same, repeats no more herein.
In like manner, carry out the foundation pit construction of the 3rd region C.Specifically, first the perimeter zone of first area A is excavated to foundation ditch absolute altitude, and builds the C30 reinforced bed of 300 millimeters thick.Then carry out the 3rd region C soil excavation to foundation ditch absolute altitude, wait while digging to certain depth, dig out after ladder platform, slope is put in the earthwork, continues to dig down one deck soil, carries out the interlayer earthwork and puts slope, the side slope soil of foundation ditch limit indwelling certain width according to the ratio of 1:2.Now, build the C20 element concrete bed course of 200 millimeters thick while digging at the 3rd region C.Then carry out the 3rd region C base plate of foundation pit structure construction, carry out the base plate of foundation pit structure construction of the perimeter zone of first area A simultaneously.Subsequently, the symmetrical excavation in the perimeter zone of the 3rd region C, and be symmetrical arranged diagonal brace 2 in this perimeter zone.
Further, reach designing requirement at concrete strength, the diagonal brace 2 of the perimeter zone of the 3rd region C construct complete and apply prestressing force after start the perimeter zone of second area B to be excavated to foundation ditch absolute altitude, and build the C30 reinforced bed of 300 millimeters thick.Then carry out the 4th region D soil excavation to foundation ditch absolute altitude, wait while digging to certain depth, dig out after ladder platform, slope is put in the earthwork, continues to dig down one deck soil, carries out the interlayer earthwork and puts slope, the side slope soil of foundation ditch limit indwelling certain width according to the ratio of 1:2.Carry out the 4th region D and build the C20 element concrete bed course of 200 millimeters thick while digging.Then carry out the 4th region D base plate of foundation pit structure construction, carry out the symmetrical excavation in perimeter zone of the 4th region D simultaneously, and be symmetrical arranged diagonal brace 2 and angle brace 4 in this perimeter zone.The base plate of foundation pit structure construction of the perimeter zone that also has second area B of synchronously carrying out.
And then, first the perimeter zone of the 3rd region C is excavated to foundation ditch absolute altitude, and builds the C30 reinforced bed of 300 millimeters thick, then the perimeter zone of the 4th region D is excavated to foundation ditch absolute altitude, and build the C30 reinforced bed of 300 millimeters thick.Finally, carry out successively the perimeter zone of the 3rd region B and the perimeter zone base plate of foundation pit structure construction of the 4th region B.So far, base plate of foundation pit 1 has been constructed.
From above disclosed technical scheme, foundation pit supporting construction of the present utility model is applicable in contrary sequence method foundation pit construction, it utilizes uplift pile and the vertical structure of completed foundation ditch, horizontal support using the permanent structure plate of foundation ditch top as foundation ditch region, enclosure wall cracking etc. can be prevented in the situation that horizontal support not being set, for whole foundation ditch provides safe construction environment.The utility model, by separately construction of diagonal brace 2 is set, makes during pit earthwork shoveling, the impact of surrounding enviroment to be reduced in various degree.Adopt diagonal brace 2 to replace Horizontal steelwork bracing, in whole foundation ditch, the main region earthwork can once be excavated on earth, does not need to excavate at twice, can cancel traditional shoveling steel trestle, has saved engineering time and cost.
In sum, foundation pit supporting construction provided by the utility model, comprises the enclosure wall and the some diagonal braces 2 that are positioned at foundation ditch side, and the top of enclosure wall is provided with hat beam 5, the top of diagonal brace 2 is fixedly connected with hat beam 5, and the bottom of diagonal brace 2 is fixedly connected with the base plate of foundation ditch.Further, the bottom of diagonal brace 2 is fixedly connected with the bracket 3 being fixed on base plate of foundation pit.Adopt this design, the horizontal permanent structure plate of foundation ditch top has replaced original Horizontal steelwork bracing, plays the effect to foundation ditch horizontal support.And the diagonal brace 2 being connected between hat beam 5 and base plate of foundation pit further plays the support to enclosure wall, foundation pit enclosure structure compared to existing technology, the supporting and protection structure of foundation ditch in contrary sequence method of the present utility model, reduce the engineering quantity of supporting and protection structure, and then avoided producing waste and the environment pollution that a large amount of solid waste cause after removing horizontal inner support.In addition, the design can also significantly reduce length and the quantity of support, diagonal brace 2 is built and is formed by steel concrete, rigidity is large, it is little to be out of shape, can make at the construction field (site) and complete installation, it is very convenient to operate, and in prior art conventional Horizontal steelwork bracing in reverse construction scene, because the horizontal structure plate constuction joint size of foundation ditch top is less, be unfavorable for the transportation of section steel material.And in the contrary sequence method of employing the present embodiment, the supporting and protection structure of foundation ditch has also reduced the work of a large amount of cuttings and fabricated structural shape, has reduced construction costs, shortened the duration, and foundation pit deformation amount can be controlled at rational scope.
Foregoing description is only the description to the utility model preferred embodiment, the not any restriction to the utility model scope, and any change, modification that those of ordinary skill in the art does according to above-mentioned disclosure, all belong to the protection domain of claims.
Claims (9)
1. a supporting and protection structure for foundation ditch in contrary sequence method, is characterized in that, comprising:
Be positioned at the enclosure wall of described foundation ditch side;
And some diagonal braces;
The top of described enclosure wall is provided with Guan Liang, and the top of described diagonal brace is fixedly connected with described Guan Liang, and the bottom of described diagonal brace is fixedly connected with the base plate of described foundation ditch.
2. the supporting and protection structure of foundation ditch in contrary sequence method as claimed in claim 1, is characterized in that: described diagonal brace is built and formed by steel concrete.
3. the supporting and protection structure of foundation ditch in contrary sequence method as claimed in claim 2, is characterized in that: the bottom of described diagonal brace is fixedly connected with the bracket being fixed on described base plate.
4. the supporting and protection structure of foundation ditch in contrary sequence method as claimed in claim 3, is characterized in that: the base plate of described foundation ditch has central area and perimeter zone, and described bracket is positioned at the edge of described base plate central area.
5. the supporting and protection structure of foundation ditch in the contrary sequence method as described in claim 3 or 4, is characterized in that: described bracket is built and formed by steel concrete.
6. the supporting and protection structure of foundation ditch in contrary sequence method as claimed in claim 5, is characterized in that: the reinforcing bar of described diagonal brace is fixedly connected with the reinforcing bar in described bracket with described Guan Liang respectively.
7. the supporting and protection structure of foundation ditch in contrary sequence method as claimed in claim 6, is characterized in that, described base plate is wedged in the one end that is positioned at the reinforcing bar of sidewall on described bracket, and the development length D that described reinforcing bar is crossed described base plate internal upper part horizontal reinforcement is greater than 1000mm.
8. the supporting and protection structure of foundation ditch in contrary sequence method as claimed in claim 1, is characterized in that, adjacent described diagonal brace level interval is 3 meters～5 meters.
9. the supporting and protection structure of foundation ditch in contrary sequence method as claimed in claim 1 or 2, is characterized in that, the angle of described diagonal brace and horizontal plane is 10 degree～20 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320829599.0U CN203654294U (en) | 2013-12-16 | 2013-12-16 | Foundation pit supporting structure used in reverse building method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320829599.0U CN203654294U (en) | 2013-12-16 | 2013-12-16 | Foundation pit supporting structure used in reverse building method |
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| CN203654294U true CN203654294U (en) | 2014-06-18 |
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| CN201320829599.0U Expired - Fee Related CN203654294U (en) | 2013-12-16 | 2013-12-16 | Foundation pit supporting structure used in reverse building method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104110038A (en) * | 2014-07-29 | 2014-10-22 | 上海市建工设计研究院有限公司 | Construction method for large-area pit support structure in deep-sludge type soft soil area |
| CN107034897A (en) * | 2017-05-23 | 2017-08-11 | 梁美欣 | Supporting construction |
| CN107059886A (en) * | 2017-05-23 | 2017-08-18 | 梁美欣 | Support system |
| CN107059887A (en) * | 2017-05-23 | 2017-08-18 | 梁美欣 | Support system |
| CN108978670A (en) * | 2017-05-31 | 2018-12-11 | 五冶集团上海有限公司 | A kind of deep basal pit locally deep pit tiltedly throws support method for protecting support |
| CN111075452A (en) * | 2019-12-23 | 2020-04-28 | 重庆市轨道交通设计研究院有限责任公司 | Geotechnical mixed vertical shaft engineering supporting system and vertical shaft construction method |
| CN113529730A (en) * | 2021-07-28 | 2021-10-22 | 中建八局天津建设工程有限公司 | Construction method of foundation pit |
| CN113684834A (en) * | 2021-08-11 | 2021-11-23 | 中国建筑第六工程局有限公司 | Construction method of complex environment supporting system |
-
2013
- 2013-12-16 CN CN201320829599.0U patent/CN203654294U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104110038A (en) * | 2014-07-29 | 2014-10-22 | 上海市建工设计研究院有限公司 | Construction method for large-area pit support structure in deep-sludge type soft soil area |
| CN107034897A (en) * | 2017-05-23 | 2017-08-11 | 梁美欣 | Supporting construction |
| CN107059886A (en) * | 2017-05-23 | 2017-08-18 | 梁美欣 | Support system |
| CN107059887A (en) * | 2017-05-23 | 2017-08-18 | 梁美欣 | Support system |
| CN108978670A (en) * | 2017-05-31 | 2018-12-11 | 五冶集团上海有限公司 | A kind of deep basal pit locally deep pit tiltedly throws support method for protecting support |
| CN111075452A (en) * | 2019-12-23 | 2020-04-28 | 重庆市轨道交通设计研究院有限责任公司 | Geotechnical mixed vertical shaft engineering supporting system and vertical shaft construction method |
| CN113529730A (en) * | 2021-07-28 | 2021-10-22 | 中建八局天津建设工程有限公司 | Construction method of foundation pit |
| CN113684834A (en) * | 2021-08-11 | 2021-11-23 | 中国建筑第六工程局有限公司 | Construction method of complex environment supporting system |
| CN113684834B (en) * | 2021-08-11 | 2022-08-26 | 中国建筑第六工程局有限公司 | Construction method of complex environment supporting system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20211216 |